S1: Accounting firms do not have a uniform way of filing and indexing working papers. s2: Audit working papers may be prepared either manually or through computer spreadsheets. s3: In an audit...

S1: Accounting firms do not have a uniform way of filing and indexing working papers. s2: Audit working papers may be prepared either manually or through computer spreadsheets. s3: In an audit engagement, the tedious job of accumulating working papers is delegated to the senior and junior auditors.

A. all statements are true

B. all statements are false

C. S1 and S2 are true

D. S1 and S3 are true